research in the areas of collusion and merger enforcement. Research relating to both collusion and mergers has made significant …-based measurement) and theoretical work in advancing our understanding of collusive and merger-related phenomena …

We study optimal merger policy in a dynamic model in which the presence of scale economies implies that firms can … the period the merger is proposed. We also find that the ability to commit can lead to a significant welfare improvement …

The merger of Fleet and BankBoston in September 1999 resulted in a regional New England lending market in which only … one large, universal bank remained. We explore the extent to which that merger resulted in monopoly rents for the combined … merger, Fleet and BankBoston charged unusually low loan interest rates, reflecting their ability to realize economies of …

in the Horizontal Merger Guidelines. Through a model of enforcement, we find that agencies challenge mergers they expect …

develop a theory of multi-plant ownership and monopsony to help guide this new policy focus. We estimate the model using U … mergers. We then simulate a representative set of U.S. mergers in order to evaluate merger review thresholds. Our main … lenient 2010 merger guidelines and unharmed, on average, under enforcement of the more stringent 1982 merger guidelines. We …

We analyze the optimal dynamic policy of an antitrust authority towards horizontal mergers when merger proposals are … endogenous and occur over time. Approving a currently proposed merger will affect the profitability and welfare effects of … surplus by using a completely myopic merger review policy that approves a merger today if and only if it does not lower …

the industries in our sample are "highly concentrated" as defined by the U.S. Horizontal Merger Guidelines, which is much …

the analytical effort is spent here. I review the theory underlying such a relationship, and develop and implement a model …

. Theory offers competing hypotheses about how competition ought to influence firm entry and access to bank credit by mature …